Serum or Plasma Mass Concentration of Glutathione Peroxidase 2

What Is Glutathione Peroxidase 2?

Glutathione peroxidase 2 (GPX2) is an enzyme that helps neutralize harmful free radicals, which are byproducts of normal cell processes and environmental exposures. It plays a role in maintaining cellular health by reducing oxidative stress, which can damage DNA, proteins, and lipids. While GPX2 is primarily found in the gastrointestinal tract, it can also be present in blood plasma or serum.

Why Might This Test Be Ordered?

Your healthcare provider may order this test if they suspect oxidative stress is contributing to symptoms like chronic fatigue, gastrointestinal issues, or if you have a history of conditions linked to oxidative damage, such as certain cancers or metabolic disorders. It may also be part of broader evaluations for genetic testing or research studies focused on oxidative biology.

Sample Collection and Preparation

Blood is typically collected in a tube without anticoagulant (for serum) or with an anticoagulant (for plasma). The sample is then processed to separate the liquid portion (serum or plasma) for testing. This test does not require fasting, but follow your provider’s instructions for preparation.

What Does a Result Mean?

Results are expressed as a mass concentration (e.g., micrograms per milliliter or another unit). Interpretation depends on clinical context, including your overall health, symptoms, and other test results. Abnormal levels may indicate increased oxidative stress or specific health concerns, but they are not standalone diagnoses.